Page authors: Don Knoke, David Giblin
Euphorbia maculata
sandmat, milk spurge, spotted spurge

Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout much of North America.

Habitat: Disturbed soil and waste areas.

Flowers: June-September

Origin: Introduced from eastern North America

Growth Duration: Annual

Conservation Status: Not of concern


Monoecious, ascending to erect annual, the stems freely-branched, 1-5 dm. tall, white-woolly below and glabrous above.


Leaves opposite, short-petiolate, oblong or oblong-lanceolate, 1-3 cm. long and 4-9 mm. wide, with long, soft hairs; stipules triangular, 1 mm. long.


Inflorescence of cymes terminal on the branches, the flowers tiny, monoecious, borne in involucres; staminate flowers numerous, naked, each consisting of a single stamen; pistillate flower single and terminal in the involucre; involucre obconic, 1.5 mm. long, bearing 4 glands separated by reniform appendages, white or pink, entire, 0.2-0.4 mm. long.


Capsules 2 mm. long; seeds golden-brown, 1.3 mm. long, flattened and shallowly pitted between the 3 or 4 rounded, longitudinal ridges.

Accepted Name:
Euphorbia maculata L.
Publication: Sp. Pl. 1: 455. 1753.

Synonyms & Misapplications:
Chamaesyce maculata (L.) Small [KZ99]
Euphorbia supina Raf. [HC]
Additional Resources:

PNW Herbaria: Specimen records of Euphorbia maculata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Euphorbia maculata checklist entry.

E-Flora BC: Euphorbia maculata atlas page.

CalPhotos: Euphorbia maculata photos.

USDA Plants: Euphorbia maculata information.

25 photographs:
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